/* 
 *  sha1.h 
 * 
 *	Copyright (C) 1998 
 *	Paul E. Jones <paulej@arid.us> 
 *	All Rights Reserved 
 * 
 ***************************************************************************** 
 *	$Id: sha1.h,v 1.2 2004/03/27 18:00:33 paulej Exp $ 
 ***************************************************************************** 
 * 
 *  Description: 
 *      This class implements the Secure Hashing Standard as defined 
 *      in FIPS PUB 180-1 published April 17, 1995. 
 * 
 *      Many of the variable names in the SHA1Context, especially the 
 *      single character names, were used because those were the names 
 *      used in the publication. 
 * 
 *      Please read the file sha1.c for more information. 
 * 
 */ 
 
#ifndef _SHA1_H_ 
#define _SHA1_H_ 
 
/*  
 *  This structure will hold context information for the hashing 
 *  operation 
 */ 
typedef struct SHA1Context 
{ 
    unsigned Message_Digest[5]; /* Message Digest (output)          */ 
 
    unsigned Length_Low;        /* Message length in bits           */ 
    unsigned Length_High;       /* Message length in bits           */ 
 
    unsigned char Message_Block[64]; /* 512-bit message blocks      */ 
    int Message_Block_Index;    /* Index into message block array   */ 
 
    int Computed;               /* Is the digest computed?          */ 
    int Corrupted;              /* Is the message digest corruped?  */ 
} SHA1Context; 
 
/* 
 *  Function Prototypes 
 */ 
void SHA1Reset(SHA1Context *); 
int SHA1Result(SHA1Context *); 
void SHA1Input( SHA1Context *, 
                const unsigned char *, 
                unsigned); 
void SHA1ProcessMessageBlock(SHA1Context *);   
void SHA1PadMessage(SHA1Context *);   
#endif 
